Envelope



Aug. 30, 1938.

M. KAHN ENVELOPE Filed Sept. 5, 1936 INVENTOR.

1%] 2 022 cz/zn,

Patented Aug. 30, 1938 PATENT OFFICE ENVELOPE Milton Kahn, New York, N. Y., assignor to Novelart Mfg. 00., New York, N. Y., a. firm Application September 5, 1936, Serial No. 99,563

2 Claims.

This invention relates to envelopes of the type wherein sealing of the envelope is performed without requiring moistening of the adhesive substance, and its principal object is to provide a simplified, conveniently and economically manufacturable, economically salable, conveniently utilizable, strong, durable, and improved envelope of this type.

Another object is to provide an envelope of the above type having improved means for the normal concealment of its adhesive coats prior to the normal utilization of the envelope.

Other objects and advantages will hereinafter appear.

I In the accompanying drawing,

Fig. .l is a rear .view elevation of the envelope of this invention, as it appears in normal state, or prior to utilization and sealing.

Fig. 2 is a transverse-sectional end elevation of the envelope shown in Fig. 1.

Fig. 3 is a view similar to Fig. 2, but showing the closing flap of the envelope distended, as resorted to during the step of sealing the envelope.-

Fig. 4 is a similar view showing the envelope 5 in completely sealed state.

Figs. 5, 6, 7, 8 are views correspondingly similar to the foregoing, illustrating a modification of the invention.

The envelope l comprises a usual addressing front wall 2, a rear wall 3 firmly glued to end flaps 4 of the former wall, and a crosswise sealing flap 5 forming part of front wall 2 which folds over the rear wall 3. In the" rear-wall 3 is formed a slot 6, and upon the underside I of said wall is provided a coating 8 of adhesive substance of a type which, whether moistened or unmoistened, will not stick or adhere to uncoated areas of paper, but will firmly stick to the same adhesive substance forming a coating of another portion of paper. Any suitable substance forming the coating 8 may be resorted to, such as a solution of para rubber in gasolene, or any other known material which will serve a similar func-- tion. Upon the upper surface 9 of the closing flap 5 is provided a similar area [0 of similar dry adhering coating, and the leading portion ll "of said flap which carries this coating is normally folded underneath the fiap proper, as clearly shown in Fig. 2, whereby normally the fiapportion H with its coating l0 appear concealed,

as is also the coating borne by the underside of the rear wall 3.

When it is desired to utilize and seal the envelope, the leading portion ll of the fiap 5 is unfolded. or straightened fiush with the surface 0 9 of the flap, then the flap portion H is passed through the slot 6 to a position underneath the rear wall 3, so that its coating I0 is in registry with the coating 8 of the latter, and then pressure is applied upon the rear wall 3 to firmly l0 adhere it to the flap 5 through the action of the dry adhering coatings l0, 8. It will be noted that by virtue of the foregoing provisions of this envelope, not only will there be no danger of its sticking to any other paper or other envelope l5 material, but its coatings l0, 8 will be both normally concealed, to obviate exposure, catching of dust, dirt, or other matter, or causing injury to the coatings.

According to the modification shown in Figs. 20 5 to 8, the leading portion ll of the closing fiap 5 is inserted underneath the rear wall 3 by passage at the edge l2 of the latter, whereby the coatings l0, 8 are thus brought into registry and the envelope is sealed by pressure upon the wall 26 3 over said coatings.

Having thus described my invention, I claim:

1. A dry adhering envelope having the combi:- nation of a front wall, a rear wall, a closing flap forming part of said front wall folding over said 30 rear wall, said rear wall having a slit, the undersurface of said rear wall having thereupon a dry adhering coat, the upper surface of said flap having a dry adhering coat, said fiap adapted to pass its leading portion through said slit to bring its 35 coat into registry with said other coat, and said portion being normally folded underneath the flap to conceal its coat. 1

2. A dry adhering envelope having the combination of a front wall, a rear wall, a closing flap 40.

forming part of said front wall having a leading portion thereof folded thereunder, the undersurface of saidrear wall having thereupon a dry adhering coat, the exterior surface of said leading portion having a dry adhering coat, and said flap 45 being adapted to unfold and pass its said leading portion underneath said rear wall to bring its coat into registry with said other coat.

MILTON KAI-IN. 

